Electronic key registration method and electronic key registration system

Abstract

A method for registering first and second electronic keys, which are capable of controlling a communication subject, to a controller of the communication subject, wherein the first electronic key is to be initially registered, and the second electronic key is to be additionally registered, the method including: performing an additional key production process including storing, in the second electronic key, an additional encryption key generation code unique to the second electronic key and an additional encryption key that is used to verify the second electronic key; and performing a key additional registration process including obtaining the additional encryption key generation code from the second electronic key when identification information unique to the communication subject is stored in the second electronic key, generating the additional encryption key with an additional encryption key generation logic, and storing the additional encryption key in the controller.

Description

TECHNICAL FIELD[0001]The present invention relates to an electronic key registration method and an electronic key registration system that register an electronic key to a controller of a communication subject.BACKGROUND ART[0002]Conventionally, a known electronic key system performs radio communication between an electronic key, which a user of a vehicle carries, and the vehicle and performs the locking or unlocking of a vehicle door and the starting or stopping of the engine when verification of the electronic key is successful. In such electronic key systems, communication between the electronic key and the vehicle needs to be protected in order to ensure security. Thus, in the electronic key system, encrypted communication is performed between the electronic key and the vehicle (for example, refer to patent document 1). In the encrypted communication, contents of communication are encrypted to ensure high confidentiality.[0003]As the above encrypted communication, the common key ...

AI Technical Summary

Benefits of technology

This approach ensures secure and easy registration of electronic keys, preventing unauthorized access and eliminating the need for simultaneous shipping of electronic keys and controllers, while allowing for flexible key management.

Problems solved by technology

However, when the vehicle ID is tampered with, the controller would determine that an unauthentic electronic key is the authentic electronic key.

Although the controller and the electronic key could be shipped together, this is complicated.

Further, an electronic key cannot be additionally registered at a later date.

This problem is not limited to electronic key systems used for vehicles.

An electronic key system for use with a building such as a house has the same problem.

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